DEVFS - remove dev_ops_add(), dev_ops_get(), and get_dev()
[dragonfly.git] / sys / platform / pc64 / isa / asc.c
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1/* asc.c - device driver for hand scanners
2 *
3 * Current version supports:
4 *
5 * - AmiScan (Mustek) Color and BW hand scanners (GI1904 chipset)
6 *
7 * Copyright (c) 1995 Gunther Schadow. All rights reserved.
8 * Copyright (c) 1995,1996,1997 Luigi Rizzo. All rights reserved.
9 * Copyright (c) 2008 The DragonFly Project.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by Gunther Schadow
22 * and Luigi Rizzo.
23 * 4. The name of the author may not be used to endorse or promote products
24 * derived from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
27 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
28 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
29 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
30 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
31 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
35 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37/*
38 * $FreeBSD: src/sys/i386/isa/asc.c,v 1.42.2.2 2001/03/01 03:22:39 jlemon Exp $
39 * $DragonFly: src/sys/platform/pc64/isa/asc.c,v 1.1 2008/08/29 17:07:19 dillon Exp $
40 */
41
42#include "use_asc.h"
43#include <sys/param.h>
44#include <sys/systm.h>
45#include <sys/conf.h>
46#include <sys/proc.h>
47#include <sys/buf.h>
48#include <sys/malloc.h>
49#include <sys/kernel.h>
50#include <sys/poll.h>
51#include <sys/selinfo.h>
52#include <sys/uio.h>
53#include <sys/thread2.h>
54
55#include <machine/asc_ioctl.h>
56
0855a2af
JG
57#include <bus/isa/isa.h>
58#include <bus/isa/isa_device.h>
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59#include "ascreg.h"
60
61/***
62 *** CONSTANTS & DEFINES
63 ***
64 ***/
65
66#define PROBE_FAIL 0
67#define PROBE_SUCCESS IO_ASCSIZE
68#define ATTACH_FAIL 0
69#define ATTACH_SUCCESS 1
70#define SUCCESS 0
71#define FAIL -1
72#define INVALID FAIL
73
74#define DMA1_READY 0x08
75#define ASCDEBUG
76#ifdef ASCDEBUG
77# define lprintf if(scu->flags & FLAG_DEBUG) kprintf
78#else
79# define lprintf (void)
80#endif
81
82#define TIMEOUT (hz*15) /* timeout while reading a buffer - default value */
83
84/***
85 *** LAYOUT OF THE MINOR NUMBER
86 ***/
87
88#define UNIT_MASK 0xc0 /* unit asc0 .. asc3 */
89#define UNIT(x) (x >> 6)
90#define DBUG_MASK 0x20
91#define FRMT_MASK 0x18 /* output format */
92#define FRMT_RAW 0x00 /* output bits as read from scanner */
93#define FRMT_GRAY 0x1 /* output gray mode for color scanner */
94#define FRMT_PBM 0x08 /* output pbm format */
95#define FRMT_PGM 0x18
96
97/***
98 *** THE GEMOMETRY TABLE
99 ***/
100
101#define GREY_LINE 826 /* 825, or 826 , or 550 ??? */
102static const struct asc_geom {
103 int dpi; /* dots per inch */
104 int dpl; /* dots per line */
105 int bpl; /* bytes per line */
106 int g_res; /* get resolution value (ASC_STAT) */
107} geomtab[] = {
108 { 800, 3312, 414, ASC_RES_800},
109 { 700, 2896, 362, ASC_RES_700},
110 { 600, 2480, 310, ASC_RES_600},
111 { 500, 1656, 258, ASC_RES_500},
112 { 400, 1656, 207, ASC_RES_400},
113 { 300, 1240, 155, ASC_RES_300},
114 { 200, 832, 104, ASC_RES_200},
115 { 100, 416, 52, ASC_RES_100},
116 { 200, 3*GREY_LINE, 3*GREY_LINE, 0 /* returned by color scanner */},
117 { 200, GREY_LINE, GREY_LINE, 0 /* color scanner, grey mode */},
118 { INVALID, 416, 52, INVALID } /* terminator */
119};
120
121/***
122 *** THE TABLE OF UNITS
123 ***/
124
125struct _sbuf {
126 size_t size;
127 size_t rptr;
128 size_t wptr; /* only changed in ascintr */
129 size_t count;
130 char *base;
131};
132
133struct asc_unit {
134 long thedev; /* XXX */
135 int base; /* base address */
136 int dma_num; /* dma number */
137 char dma_byte; /* mask of byte for setting DMA value */
138 char int_byte; /* mask of byte for setting int value */
139 char cfg_byte; /* mirror of byte written to config reg (ASC_CFG). */
140 char cmd_byte; /* mirror of byte written to cmd port (ASC_CMD)*/
141 char portf_byte;
142 int flags;
143#define ATTACHED 0x01
144#define OPEN 0x02
145#define READING 0x04
146#define DMA_ACTIVE 0x08
147#define SLEEPING 0x10
148#define SEL_COLL 0x20
149#define PBM_MODE 0x40
150#define FLAG_DEBUG 0x80
151 int geometry; /* resolution as geomtab index */
152 int linesize; /* length of one scan line (from geom.table) */
153 int blen; /* length of buffer in lines */
154 int btime; /* timeout of buffer in seconds/hz */
155 struct _sbuf sbuf;
156 long icnt; /* interrupt count XXX for debugging */
157 struct selinfo selp;
158 int height; /* height, for pnm modes */
159 size_t bcount; /* bytes to read, for pnm modes */
160};
161
162static struct asc_unit unittab[NASC];
163
164/*** I could not find a reasonable buffer size limit other than by
165 *** experiments. MAXPHYS is obviously too much, while DEV_BSIZE and
166 *** PAGE_SIZE are really too small. There must be something wrong
167 *** with isa_dmastart/isa_dmarangecheck HELP!!!
168 ***
169 *** Note, must be DEFAULT_BLEN * samples_per_line <= MAX_BUFSIZE
170 ***/
171#define MAX_BUFSIZE 0xb000 /* XXX was 0x3000 */
172#define DEFAULT_BLEN 16
173
174/***
175 *** THE PER-DRIVER RECORD FOR ISA.C
176 ***/
177static int ascprobe (struct isa_device *isdp);
178static int ascattach(struct isa_device *isdp);
179struct isa_driver ascdriver = { ascprobe, ascattach, "asc" };
180
181static void ascintr(void *);
182
183static d_open_t ascopen;
184static d_close_t ascclose;
185static d_read_t ascread;
186static d_ioctl_t ascioctl;
187static d_poll_t ascpoll;
188
189#define CDEV_MAJOR 71
190
191static struct dev_ops asc_ops = {
192 { "asc", CDEV_MAJOR, 0 },
193 .d_open = ascopen,
194 .d_close = ascclose,
195 .d_read = ascread,
196 .d_ioctl = ascioctl,
197 .d_poll = ascpoll,
198};
199
200#define STATIC static
201
202/***
203 *** LOCALLY USED SUBROUTINES
204 ***
205 ***/
206
207/***
208 *** get_resolution
209 *** read resolution from the scanner
210 ***/
211static void
212get_resolution(struct asc_unit *scu)
213{
214 int res, i, delay;
215
216 res=0;
217 scu->cmd_byte = ASC_STANDBY;
218 outb(ASC_CMD, scu->cmd_byte);
219 tsleep((caddr_t)scu, PCATCH, "ascres", hz/10);
220 for(delay= 100; (res=inb(ASC_STAT)) & ASC_RDY_FLAG; delay--)
221 {
222 i = tsleep((caddr_t)scu, PCATCH, "ascres0", 1);
223 if ( ( i == 0 ) || ( i == EWOULDBLOCK ) )
224 i = SUCCESS;
225 else
226 break;
227 }
228 if (delay==0) {
229 lprintf("asc.get_resolution: timeout completing command\n");
230 return /* -1 */;
231 }
232 /* ... actual read resolution... */
233 res &= ASC_RES_MASK;
234 for (i=0; geomtab[i].dpi != INVALID; i++) {
235 if (geomtab[i].g_res == res) break;
236 }
237 if (geomtab[i].dpi==INVALID) {
238 scu->geometry= i; /* INVALID; */
239 lprintf("asc.get_resolution: wrong resolution\n");
240 } else {
241 lprintf("asc.get_resolution: %d dpi\n",geomtab[i].dpi);
242 scu->geometry = i;
243 }
244 scu->portf_byte=0; /* default */
245 if (geomtab[scu->geometry].g_res==0 && !(scu->thedev&FRMT_GRAY)) {
246 /* color scanner seems to require this */
247 scu->portf_byte=2;
248 /* scu->geometry++; */
249 }
250 scu->linesize = geomtab[scu->geometry].bpl;
251 scu->height = geomtab[scu->geometry].dpl; /* default... */
252}
253
254/***
255 *** buffer_allocate
256 *** allocate/reallocate a buffer
257 *** Now just checks that the preallocated buffer is large enough.
258 ***/
259
260static int
261buffer_allocate(struct asc_unit *scu)
262{
263 size_t size, size1;
264
265 size = scu->blen * scu->linesize;
266
267 lprintf("asc.buffer_allocate: need 0x%x bytes\n", size);
268
269 if ( size > MAX_BUFSIZE ) {
270 size1=size;
271 size= ( (MAX_BUFSIZE+scu->linesize-1) / scu->linesize)*scu->linesize;
272 lprintf("asc.buffer_allocate: 0x%x bytes are too much, try 0x%x\n",
273 size1, size);
274 return ENOMEM;
275 }
276
277 scu->sbuf.size = size;
278 scu->sbuf.rptr = 0;
279 scu->sbuf.wptr = 0;
280 scu->sbuf.count = 0; /* available data for reading */
281
282 lprintf("asc.buffer_allocate: ok\n");
283
284 return SUCCESS;
285}
286
287/*** dma_restart
288 *** invoked locally to start dma. Must run in a critical section
289 ***/
290static void
291dma_restart(struct asc_unit *scu)
292{
293 unsigned char al=scu->cmd_byte;
294
295 if (geomtab[scu->geometry].g_res==0) {/* color */
296 isa_dmastart(BUF_CMD_READ, 0, scu->sbuf.base+scu->sbuf.wptr,
297 scu->linesize + 90 /* XXX */ , scu->dma_num);
298 /*
299 * looks like we have to set and then clear this
300 * bit to enable the scanner to send interrupts
301 */
302 outb( ASC_CMD, al |= 4 ); /* seems to disable interrupts */
303#if 0
304 outb( ASC_CMD, al |= 8 ); /* ??? seems useless */
305#endif
306 outb( ASC_CMD, al &= 0xfb );
307 scu->cmd_byte = al;
308 } else { /* normal */
309 isa_dmastart(BUF_CMD_READ, 0, scu->sbuf.base+scu->sbuf.wptr,
310 scu->linesize, scu->dma_num);
311 /*** this is done in sub_20, after dmastart ? ***/
312#if 0
313 outb( ASC_CMD, al |= 4 );
314 outb( ASC_CMD, al |= 8 ); /* ??? seems useless */
315 outb( ASC_CMD, al &= 0xfb );
316 scu->cmd_byte = al;
317#else
318 outb( ASC_CMD, ASC_OPERATE);
319#endif
320 }
321 scu->flags |= DMA_ACTIVE;
322}
323
324/***
325 *** the main functions
326 ***/
327
328/*** asc_reset
329 *** resets the scanner and the config bytes...
330 ***/
331static void
332asc_reset(struct asc_unit *scu)
333{
334 scu->cfg_byte = 0 ; /* clear... */
335 scu->cmd_byte = 0 ; /* clear... */
336
337 outb(ASC_CFG,scu->cfg_byte); /* for safety, do this here */
338 outb(ASC_CMD,scu->cmd_byte); /* probably not needed */
339 tsleep((caddr_t)scu, PCATCH, "ascres", hz/10); /* sleep .1 sec */
340
341 scu->blen = DEFAULT_BLEN;
342 scu->btime = TIMEOUT;
343 scu->height = 0 ; /* don't know better... */
344}
345/**************************************************************************
346 ***
347 *** ascprobe
348 *** read status port and check for proper configuration:
349 *** - if address group matches (status byte has reasonable value)
350 *** cannot check interrupt/dma, only clear the config byte.
351 ***/
352static int
353ascprobe (struct isa_device *isdp)
354{
355 int unit = isdp->id_unit;
356 struct asc_unit *scu = unittab + unit;
357 int stb;
358
359 scu->base = isdp->id_iobase; /*** needed by the following macros ***/
360 scu->flags = FLAG_DEBUG;
361
362 if ( isdp->id_iobase < 0 ) {
363 lprintf("asc%d.probe: no iobase given\n", unit);
364 return PROBE_FAIL;
365 }
366
367 if ((stb=inb(ASC_PROBE)) != ASC_PROBE_VALUE) {
368 lprintf("asc%d.probe: failed, got 0x%02x instead of 0x%02x\n",
369 unit, stb, ASC_PROBE_VALUE);
370 return PROBE_FAIL;
371 }
372
373/*
374 * NOTE NOTE NOTE
375 * the new AmiScan Color board uses int 10,11,12 instead of 3,5,10
376 * respectively. This means that the driver must act accordingly.
377 * Unfortunately there is no easy way of telling which board one has,
378 * other than trying to get an interrupt and noticing that it is
379 * missing. use "option ASC_NEW_BOARD" if you have a new board.
380 *
381 */
382
383#if ASC_NEW_BOARD
384#define ASC_IRQ_A 10
385#define ASC_IRQ_B 11
386#define ASC_IRQ_C 12
387#else
388#define ASC_IRQ_A 3
389#define ASC_IRQ_B 5
390#define ASC_IRQ_C 10
391#endif
392
393 switch(ffs(isdp->id_irq) - 1) {
394 case ASC_IRQ_A :
395 scu->int_byte = ASC_CNF_IRQ3;
396 break;
397 case ASC_IRQ_B :
398 scu->int_byte = ASC_CNF_IRQ5;
399 break;
400 case ASC_IRQ_C :
401 scu->int_byte = ASC_CNF_IRQ10;
402 break;
403#if 0
404 case -1:
405 scu->int_byte = 0;
406 lprintf("asc%d.probe: warning - going interruptless\n", unit);
407 break;
408#endif
409 default:
410 lprintf("asc%d.probe: unsupported INT %d (only 3, 5, 10)\n",
411 unit, ffs(isdp->id_irq) - 1 );
412 return PROBE_FAIL;
413 }
414 scu->dma_num = isdp->id_drq;
415 switch(scu->dma_num) {
416 case 1:
417 scu->dma_byte = ASC_CNF_DMA1;
418 break;
419 case 3:
420 scu->dma_byte = ASC_CNF_DMA3;
421 break;
422 default:
423 lprintf("asc%d.probe: unsupported DMA %d (only 1 or 3)\n",
424 unit, scu->dma_num);
425 return PROBE_FAIL;
426 }
427 asc_reset(scu);
428/* lprintf("asc%d.probe: ok\n", unit); */
429
430 scu->flags &= ~FLAG_DEBUG;
431 scu->icnt = 0;
432 return PROBE_SUCCESS;
433}
434
435/**************************************************************************
436 ***
437 *** ascattach
438 *** finish initialization of unit structure, get geometry value (?)
439 ***/
440
441static int
442ascattach(struct isa_device *isdp)
443{
444 int unit = isdp->id_unit;
445 struct asc_unit *scu = unittab + unit;
446
447 isdp->id_intr = (inthand2_t *)ascintr;
448 scu->flags |= FLAG_DEBUG;
449 kprintf("asc%d: [GI1904/Trust Ami-Scan Grey/Color]\n", unit);
450
451 /*
452 * Initialize buffer structure.
453 * XXX this must be done early to give a good chance of getting a
454 * contiguous buffer. This wastes memory.
455 */
456 scu->sbuf.base = contigmalloc((unsigned long)MAX_BUFSIZE, M_DEVBUF, M_NOWAIT,
457 0ul, 0xfffffful, 1ul, 0x10000ul);
458 if ( scu->sbuf.base == NULL )
459 {
460 lprintf("asc%d.attach: buffer allocation failed\n", unit);
461 return ATTACH_FAIL; /* XXX attach must not fail */
462 }
463 scu->sbuf.size = INVALID;
464 scu->sbuf.rptr = INVALID;
465
466 scu->flags |= ATTACHED;
467/* lprintf("asc%d.attach: ok\n", unit); */
468 scu->flags &= ~FLAG_DEBUG;
469
470 scu->selp.si_flags=0;
471 scu->selp.si_pid=(pid_t)0;
472#define ASC_UID 0
473#define ASC_GID 13
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474 make_dev(&asc_ops, unit<<6, ASC_UID, ASC_GID, 0666, "asc%d", unit);
475 make_dev(&asc_ops, ((unit<<6) + FRMT_PBM),
3e82b46c 476 ASC_UID, ASC_GID, 0666, "asc%dp", unit);
c8fe38ae 477 make_dev(&asc_ops, ((unit<<6) + DBUG_MASK),
3e82b46c 478 ASC_UID, ASC_GID, 0666, "asc%dd", unit);
c8fe38ae 479 make_dev(&asc_ops, ((unit<<6) + DBUG_MASK+FRMT_PBM),
3e82b46c 480 ASC_UID, ASC_GID, 0666, "asc%dpd", unit);
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481 return ATTACH_SUCCESS;
482}
483
484/**************************************************************************
485 ***
486 *** ascintr
487 *** the interrupt routine, at the end of DMA...
488 ***/
489static void
490ascintr(void *arg)
491{
492 int unit = (int)arg;
493 struct asc_unit *scu = unittab + unit;
494 int chan_bit = 0x01 << scu->dma_num;
495
496 scu->icnt++;
497 /* ignore stray interrupts... */
498 if ((scu->flags & (OPEN |READING)) != (OPEN | READING) ) {
499 /* must be after closing... */
500 scu->flags &= ~(OPEN | READING | DMA_ACTIVE | SLEEPING | SEL_COLL);
501 return;
502 }
503 if ( (scu->flags & DMA_ACTIVE) && (inb(DMA1_READY) & chan_bit) != 0) {
504 outb( ASC_CMD, ASC_STANDBY);
505 scu->flags &= ~DMA_ACTIVE;
506 /* bounce buffers... */
507 isa_dmadone(BUF_CMD_READ, 0, scu->sbuf.base+scu->sbuf.wptr,
508 scu->linesize, scu->dma_num);
509 scu->sbuf.wptr += scu->linesize;
510 if (scu->sbuf.wptr >= scu->sbuf.size) scu->sbuf.wptr=0;
511 scu->sbuf.count += scu->linesize;
512 if (scu->flags & SLEEPING) {
513 scu->flags &= ~SLEEPING;
514 wakeup((caddr_t)scu);
515 }
516 if (scu->sbuf.size - scu->sbuf.count >= scu->linesize) {
517 dma_restart(scu);
518 }
519 if (scu->selp.si_pid) {
520 selwakeup(&scu->selp);
521 scu->selp.si_pid=(pid_t)0;
522 scu->selp.si_flags = 0;
523 }
524 }
525}
526
527/**************************************************************************
528 ***
529 *** ascopen
530 *** set open flag, set modes according to minor number
531 *** FOR RELEASE:
532 *** don't switch scanner on, wait until first read or ioctls go before
533 ***/
534
535STATIC int
536ascopen(struct dev_open_args *ap)
537{
538 cdev_t dev = ap->a_head.a_dev;
539 struct asc_unit *scu;
540 int unit;
541
542 unit = UNIT(minor(dev)) & UNIT_MASK;
543 if ( unit >= NASC )
544 {
545#ifdef ASCDEBUG
546 /* XXX lprintf isn't valid here since there is no scu. */
547 kprintf("asc%d.open: unconfigured unit number (max %d)\n", unit, NASC);
548#endif
549 return ENXIO;
550 }
551 scu = unittab + unit;
552 if ( !( scu->flags & ATTACHED ) )
553 {
554 lprintf("asc%d.open: unit was not attached successfully 0x%04x\n",
555 unit, scu->flags);
556 return ENXIO;
557 }
558
559 if ( minor(dev) & DBUG_MASK )
560 scu->flags |= FLAG_DEBUG;
561 else
562 scu->flags &= ~FLAG_DEBUG;
563
564 switch(minor(dev) & FRMT_MASK) {
565 case FRMT_PBM:
566 scu->flags |= PBM_MODE;
567 lprintf("asc%d.open: pbm mode\n", unit);
568 break;
569 case FRMT_RAW:
570 lprintf("asc%d.open: raw mode\n", unit);
571 scu->flags &= ~PBM_MODE;
572 break;
573 default:
574 lprintf("asc%d.open: gray maps are not yet supported", unit);
575 return ENXIO;
576 }
577
578 lprintf("asc%d.open: minor %d icnt %ld\n", unit, minor(dev), scu->icnt);
579
580 if ( scu->flags & OPEN ) {
581 lprintf("asc%d.open: already open", unit);
582 return EBUSY;
583 }
584 if (isa_dma_acquire(scu->dma_num))
585 return(EBUSY);
586
587 scu->flags = ATTACHED | OPEN;
588
589 asc_reset(scu);
590 get_resolution(scu);
591 return SUCCESS;
592}
593
594static int
595asc_startread(struct asc_unit *scu)
596{
597 /*** from here on, things can be delayed to the first read/ioctl ***/
598 /*** this was done in sub_12... ***/
599 scu->cfg_byte= scu->cmd_byte=0; /* init scanner */
600 outb(ASC_CMD, scu->cmd_byte);
601 /*** this was done in sub_16, set scan len... ***/
602 outb(ASC_BOH, scu->portf_byte );
603 if (geomtab[scu->geometry].g_res==0) { /* color */
604 scu->cmd_byte = 0x00 ;
605 } else {
606 scu->cmd_byte = 0x90 ;
607 }
608 outb(ASC_CMD, scu->cmd_byte);
609 outb(ASC_LEN_L, scu->linesize & 0xff /* len_low */);
610 outb(ASC_LEN_H, (scu->linesize >>8) & 0xff /* len_high */);
611 /*** this was done in sub_21, config DMA ... ***/
612 scu->cfg_byte |= scu->dma_byte;
613 outb(ASC_CFG, scu->cfg_byte);
614 /*** sub_22: enable int on the scanner ***/
615 scu->cfg_byte |= scu->int_byte;
616 outb(ASC_CFG, scu->cfg_byte);
617 /*** sub_28: light on etc...***/
618 scu->cmd_byte = ASC_STANDBY;
619 outb(ASC_CMD, scu->cmd_byte);
620 tsleep((caddr_t)scu, PCATCH, "ascstrd", hz/10); /* sleep .1 sec */
621 return SUCCESS;
622}
623
624/**************************************************************************
625 ***
626 *** ascclose
627 *** turn off scanner, release the buffer
628 *** should probably terminate dma ops, release int and dma. lr 12mar95
629 ***/
630
631STATIC int
632ascclose(struct dev_close_args *ap)
633{
634 cdev_t dev = ap->a_head.a_dev;
635 int unit = UNIT(minor(dev));
636 struct asc_unit *scu = unittab + unit;
637
638 lprintf("asc%d.close: minor %d\n",
639 unit, minor(dev));
640
641 if ( unit >= NASC || !( scu->flags & ATTACHED ) ) {
642 lprintf("asc%d.close: unit was not attached successfully 0x%04x\n",
643 unit, scu->flags);
644 return ENXIO;
645 }
646 /* all this is in sub_29... */
647 /* cli(); */
648 outb(ASC_CFG, 0 ); /* don't save in CFG byte!!! */
649 scu->cmd_byte &= ~ASC_LIGHT_ON;
650 outb(ASC_CMD, scu->cmd_byte);/* light off */
651 tsleep((caddr_t)scu, PCATCH, "ascclo", hz/2); /* sleep 1/2 sec */
652 scu->cfg_byte &= ~ scu->dma_byte ; /* disable scanner dma */
653 scu->cfg_byte &= ~ scu->int_byte ; /* disable scanner int */
654 outb(ASC_CFG, scu->cfg_byte);
655 /* --- disable dma controller ? --- */
656 isa_dma_release(scu->dma_num);
657 /* --- disable interrupts on the controller (sub_24) --- */
658
659 scu->sbuf.size = INVALID;
660 scu->sbuf.rptr = INVALID;
661
662 scu->flags &= ~(FLAG_DEBUG | OPEN | READING);
663
664 return SUCCESS;
665}
666
667static void
668pbm_init(struct asc_unit *scu)
669{
670 int width = geomtab[scu->geometry].dpl;
671 int l= ksprintf(scu->sbuf.base,"P4 %d %d\n", width, scu->height);
672 char *p;
673
674 scu->bcount = scu->height * width / 8 + l;
675
676 /* move header to end of sbuf */
677 scu->sbuf.rptr=scu->sbuf.size-l;
678 bcopy(scu->sbuf.base, scu->sbuf.base+scu->sbuf.rptr,l);
679 scu->sbuf.count = l;
680 if (geomtab[scu->geometry].g_res!=0) { /* BW scanner */
681 for(p = scu->sbuf.base + scu->sbuf.rptr; l; p++, l--)
682 *p = ~*p;
683}
684}
685/**************************************************************************
686 ***
687 *** ascread
688 ***/
689
690STATIC int
691ascread(struct dev_read_args *ap)
692{
693 cdev_t dev = ap->a_head.a_dev;
694 struct uio *uio = ap->a_uio;
695 int unit = UNIT(minor(dev));
696 struct asc_unit *scu = unittab + unit;
697 size_t nbytes;
698 int res;
699 unsigned char *p;
700
701 lprintf("asc%d.read: minor %d icnt %ld\n", unit, minor(dev), scu->icnt);
702
703 if ( unit >= NASC || !( scu->flags & ATTACHED ) ) {
704 lprintf("asc%d.read: unit was not attached successfully 0x%04x\n",
705 unit, scu->flags);
706 return ENXIO;
707 }
708
709 if ( !(scu->flags & READING) ) { /*** first read... ***/
710 /* allocate a buffer for reading data and init things */
711 if ( (res = buffer_allocate(scu)) == SUCCESS ) scu->flags |= READING;
712 else return res;
713 asc_startread(scu);
714 if ( scu->flags & PBM_MODE ) { /* initialize for pbm mode */
715 pbm_init(scu);
716 }
717 }
718
719 lprintf("asc%d.read(before): "
720 "sz 0x%x, rptr 0x%x, wptr 0x%x, cnt 0x%x bcnt 0x%x flags 0x%x icnt %ld\n",
721 unit, scu->sbuf.size, scu->sbuf.rptr,
722 scu->sbuf.wptr, scu->sbuf.count, scu->bcount,scu->flags,
723 scu->icnt);
724
725 crit_enter();
726 if ( scu->sbuf.count == 0 ) { /* no data avail., must wait */
727 if (!(scu->flags & DMA_ACTIVE)) dma_restart(scu);
728 scu->flags |= SLEEPING;
729 res = tsleep((caddr_t)scu, PCATCH, "ascread", 0);
730 scu->flags &= ~SLEEPING;
731 if ( res == 0 ) res = SUCCESS;
732 }
733 crit_exit();
734 if (scu->flags & FLAG_DEBUG)
735 tsleep((caddr_t)scu, PCATCH, "ascdly",hz);
736 lprintf("asc%d.read(after): "
737 "sz 0x%x, rptr 0x%x, wptr 0x%x, cnt 0x%x bcnt 0x%x flags 0x%x icnt %ld\n",
738 unit, scu->sbuf.size, scu->sbuf.rptr,
739 scu->sbuf.wptr, scu->sbuf.count, scu->bcount,scu->flags,scu->icnt);
740
741 /* first, not more than available... */
742 nbytes = min( uio->uio_resid, scu->sbuf.count );
743 /* second, contiguous data... */
744 nbytes = min( nbytes, (scu->sbuf.size - scu->sbuf.rptr) );
745 /* third, one line (will remove this later, XXX) */
746 nbytes = min( nbytes, scu->linesize );
747 if ( (scu->flags & PBM_MODE) )
748 nbytes = min( nbytes, scu->bcount );
749 lprintf("asc%d.read: transferring 0x%x bytes\n", unit, nbytes);
750 if (geomtab[scu->geometry].g_res!=0) { /* BW scanner */
751 lprintf("asc%d.read: invert buffer\n",unit);
752 for(p = scu->sbuf.base + scu->sbuf.rptr, res=nbytes; res; p++, res--)
753 *p = ~*p;
754 }
755 res = uiomove(scu->sbuf.base + scu->sbuf.rptr, nbytes, uio);
756 if ( res != SUCCESS ) {
757 lprintf("asc%d.read: uiomove failed %d", unit, res);
758 return res;
759 }
760
761 crit_enter();
762 scu->sbuf.rptr += nbytes;
763 if (scu->sbuf.rptr >= scu->sbuf.size) scu->sbuf.rptr=0;
764 scu->sbuf.count -= nbytes;
765 /* having moved some data, can read mode */
766 if (!(scu->flags & DMA_ACTIVE)) dma_restart(scu);
767 crit_exit();
768 if ( scu->flags & PBM_MODE ) scu->bcount -= nbytes;
769
770 lprintf("asc%d.read: size 0x%x, pointer 0x%x, bcount 0x%x, ok\n",
771 unit, scu->sbuf.size, scu->sbuf.rptr, scu->bcount);
772
773 return SUCCESS;
774}
775
776/**************************************************************************
777 ***
778 *** ascioctl
779 ***/
780
781STATIC int
782ascioctl(struct dev_ioctl_args *ap)
783{
784 cdev_t dev = ap->a_head.a_dev;
785 caddr_t data = ap->a_data;
786 int unit = UNIT(minor(dev));
787 struct asc_unit *scu = unittab + unit;
788
789 lprintf("asc%d.ioctl: minor %d\n",
790 unit, minor(dev));
791
792 if ( unit >= NASC || !( scu->flags & ATTACHED ) ) {
793 lprintf("asc%d.ioctl: unit was not attached successfully 0x%04x\n",
794 unit, scu->flags);
795 return ENXIO;
796 }
797 switch(ap->a_cmd) {
798 case ASC_GRES:
799 asc_reset(scu);
800 get_resolution(scu);
801 *(int *)data=geomtab[scu->geometry].dpi;
802 lprintf("asc%d.ioctl:ASC_GRES %ddpi\n", unit, *(int *)data);
803 return SUCCESS;
804 case ASC_GWIDTH:
805 *(int *)data=geomtab[scu->geometry].dpl;
806 lprintf("asc%d.ioctl:ASC_GWIDTH %d\n", unit, *(int *)data);
807 return SUCCESS;
808 case ASC_GHEIGHT:
809 *(int *)data=scu->height;
810 lprintf("asc%d.ioctl:ASC_GHEIGHT %d\n", unit, *(int *)data);
811 return SUCCESS;
812 case ASC_SHEIGHT:
813 lprintf("asc%d.ioctl:ASC_SHEIGHT %d\n", unit, *(int *)data);
814 if ( scu->flags & READING ) {
815 lprintf("asc%d:ioctl on already reading unit\n", unit);
816 return EBUSY;
817 }
818 scu->height=*(int *)data;
819 return SUCCESS;
820#if 0
821 case ASC_GBLEN:
822 *(int *)data=scu->blen;
823 lprintf("asc%d.ioctl:ASC_GBLEN %d\n", unit, *(int *)data);
824 return SUCCESS;
825 case ASC_SBLEN:
826 lprintf("asc%d.ioctl:ASC_SBLEN %d\n", unit, *(int *)data);
827 if (*(int *)data * geomtab[scu->geometry].dpl / 8 > MAX_BUFSIZE)
828 {
829 lprintf("asc%d:ioctl buffer size too high\n", unit);
830 return ENOMEM;
831 }
832 scu->blen=*(int *)data;
833 return SUCCESS;
834 case ASC_GBTIME:
835 *(int *)data = scu->btime / hz;
836 lprintf("asc%d.ioctl:ASC_GBTIME %d\n", unit, *(int *)data);
837 return SUCCESS;
838 case ASC_SBTIME:
839 scu->btime = *(int *)data * hz;
840 lprintf("asc%d.ioctl:ASC_SBTIME %d\n", unit, *(int *)data);
841 return SUCCESS;
842#endif
843 default: return ENOTTY;
844 }
845 return SUCCESS;
846}
847
848STATIC int
849ascpoll(struct dev_poll_args *ap)
850{
851 cdev_t dev = ap->a_head.a_dev;
852 int unit = UNIT(minor(dev));
853 struct asc_unit *scu = unittab + unit;
854 int revents = 0;
855
856 crit_enter();
857
858 if (ap->a_events & (POLLIN | POLLRDNORM)) {
859 if (scu->sbuf.count >0)
860 revents |= ap->a_events & (POLLIN | POLLRDNORM);
861 else {
862 if (!(scu->flags & DMA_ACTIVE))
863 dma_restart(scu);
864
865 selrecord(curthread, &scu->selp);
866 }
867 }
868 crit_exit();
869 ap->a_events = revents;
870 return (0);
871}